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STUSB4500 数据表(PDF) 20 Page - STMicroelectronics |
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STUSB4500 数据表(HTML) 20 Page - STMicroelectronics |
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20 / 41 page  Parameter name Parameter description Reset value (default) Value Description VBUS_DISCH_TIME_TO_PDO Coefficient used to compute VBUS discharge time when transitioning to lower PDO voltage 1100b (12) 0001b to 1111b 1 ≤ TDISPARPDO ≤ 15 by increment of 1 Unit discharge time: 24 ms (typ.) Default coefficient TDISPARPDO = 12, discharge time TDISUSBPDO = 288 ms VBUS_DISCH_DISABLE VBUS discharge deactivation on VBUS_VS_DISCH and DISCH pins 0b 0b VBUS discharge enabled 1b VBUS discharge disabled USB_COMM_CAPABLE USB 2.0 or 3.x data communication capability by sink system 0b 0b Sink does not support data communication 1b Sink supports data communication SNK_UNCONS_POWER Unconstrained Power bit setting in capabilities message sent by the sink 0b 0b No external source of power 1b An external source of power is available and is sufficient to adequately power the system while charging external devices REQ_SRC_CURRENT In case of match, selects which operating current from the sink or the source is to be requested in the RDO message 0b 0b Request I(SNK_PDO) as operating current in RDO message 1b Request I(SRC_PDO) as operating current in RDO message POWER_OK_CFG[1:0] Selects POWER_OK pins configuration (see Section 2.2.8 POWER_OK2 / POWER_OK3) 10b 00b Configuration 1 01b Not applicable 10b Configuration 2 (default) 11b Configuration 3 POWER_ONLY_ABOVE_5V Selects VBUS_EN_SNK pin configuration (see Section 2.2.10 VBUS_EN_SNK) 0b 0b VBUS_EN_SNK pin enabled when source attached whatever VBUS voltage (5 V or any PDO voltage) 1b VBUS_EN_SNK pin enabled only when source attached and VBUS voltage negotiated to PDO2 or PDO3 voltage GPIO_CFG[1:0] Selects GPIO pin configuration (see Section 2.2.9 GPIO) 01b 00b SW_CTRL_GPIO 01b ERROR_RECOVERY 10b DEBUG 11b SINK_POWER STUSB4500 Default start-up configuration DS12499 - Rev 2 page 20/41 |
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